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Numerical Modeling of Dissolved Oxygen in an Ultra-Urban Best Management Practice

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Abstract:

Stormvault (Jensen Precast, Sparks, Nevada) is a retention-type ultra-urban best management practice, which has been tested extensively for pollutant reduction. As the first step to understand the internal water quality change during a dry-weather condition, dissolved oxygen was monitored in a Stormvault system. A diffusion-reaction model was developed to diagnose the contributions of organic materials floating on the water surface, in the water column, and in the sediment, to dissolved oxygen decrease. The mathematical model was calibrated using the observed dissolved oxygen data recorded at a 0.15-m interval along the water column depth. Three scenarios were simulated, and the results confirmed that sediment oxygen demand (SOD) is the governing factor controlling a dissolved oxygen decrease in the system. The SOD rate reaches 0.8 g m −2 d −1 at 20°C, with an average sediment accumulation depth of 0.05 m, which is lower than the recommended cleanup depth of 0.15 m.

Keywords: Stormvault; diffusion-reaction model; dissolved oxygen; sediment oxygen demand

Document Type: Research Article

DOI: https://doi.org/10.2175/106143008X357138

Affiliations: Tetra Tech Inc., Fairfax, Virginia.

Publication date: 2009-04-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research� (WER�) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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